<template>
  <div class="list" ref="wrapper">
    <div>
      <div class="area">
        <div class="title border-topbottom">当前城市</div>
        <div class="button-list">
          <div class="button-wrapper">
            <div class="button">
              <!-- {{ this.$store.state.city }} -->
              {{ this.currentCity }}
            </div>
          </div>
        </div>
      </div>
      <div class="area">
        <div class="title border-topbottom">热门城市</div>
        <div class="button-list">
          <div
            class="button-wrapper"
            v-for="item of hot"
            :key="item.id"
            @click="handleCityClick(item.name)"
          >
            <div class="button">{{ item.name }}</div>
          </div>
        </div>
      </div>
      <div class="area" :ref="key" v-for="(item, key) of cities" :key="key">
        <div class="title border-topbottom">{{ key }}</div>
        <div
          class="item-list"
          v-for="innerItem of item"
          :key="innerItem.id"
          @click="handleCityClick(innerItem.name)"
        >
          <div class="item border-bottom">{{ innerItem.name }}</div>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import BScroll from "@better-scroll/core";
import Pullup from "@better-scroll/pull-up";
import { mapState, mapActions } from "vuex";

BScroll.use(Pullup);
export default {
  name: "CityList",
  props: {
    hot: Array,
    cities: Object,
    letter: String
  },
  computed: {
    ...mapState({
      currentCity: "city"
    })
  },
  methods: {
    handleCityClick(city) {
      // this.$store.dispatch("changeCity", city);
      this.changeCity(city);
      this.$router.push("/").catch(() => {});
    },
    ...mapActions(["changeCity"])
  },
  mounted() {
    this.scroll = new BScroll(this.$refs.wrapper, {
      pullUpLoad: true
    });
  },
  updated() {
    this.scroll.refresh();
    this.scroll.finishPullUp();
  },
  watch: {
    letter() {
      if (this.letter) {
        const element = this.$refs[this.letter][0];
        this.scroll.scrollToElement(element);
      }
    }
  }
};
</script>

<style lang="stylus" scoped>
@import '~styles/variables.styl'
.border-topbottom
  &::before
    border-color: #ccc
  &::after
    border-color: #ccc
.border-bottom
  &::before
    border-color: #ccc
.list
  overflow: hidden
  position: absolute
  top: 1.58rem
  left: 0
  right: 0
  bottom: 0
.title
  line-height: 0.54rem
  background: #eee
  padding-left: 0.2rem
  font-size: 0.26rem
  color: #666
.button-list
  padding: 0.1rem 0.6rem 0.1rem 0.1rem
  overflow: hidden
  .button-wrapper
    float: left
    width: 33.33%
    .button
      margin: 0.1rem
      padding: 0.1rem 0
      text-align: center
      border: 0.02rem solid #ccc
      border-radius: 0.06rem
.item-list
  .item
    line-height: 0.54rem
    color: #666666
    padding-left: 0.2rem
</style>
